Automatic calibration system and method of resistance absorbing instrument

Abstract

The invention relates to an absorbing resistance instrument automatic calibration system, which is provided with a gas circuit device and an electric control gear. The gas circuit device comprises a calibration gas circuit and a measuring gas circuit. The calibration gas circuit is provided with two absorbing resistance rod gauge measuring heads. The measuring gas circuit is provided with a sample measuring head. The calibration gas circuit and the measuring gas circuit respectively pass through a motorized valve and a hand-operated valve, and then are connected with a negative pressure vacuum air pump by the same constant flow element and a surge chamber. The constant flow element and the surge chamber are internally provided with a gas differential pressure pickup. The electric control gear is provided with a drawing resistance main control panel, the output end of which is respectively connected with the motorized valve in each gas circuit by a drawing resistance interface board; a serial communication interface of the drawing resistance main control board is connected with a drawing resistance sensor by an AD sampling panel. The method is as follows: the negative pressure vacuum air pump is started; the benchmark pressure of the measuring gas circuit and the calibration gas circuit are regulated; a first drawing resistance rod gauge is calibrated; a second drawing resistance rod gauge is calibrated; the calibration cure parameter is calculated to obtain the rate of slope of the specification curve and the gain. The system avoids artificial interference, realizes automatically controlled real time calibration, and is suitable for batch test.

Description

technical field [0001] The invention relates to a cigarette filter stick object detection system, in particular to an automatic calibration system and calibration method for a drag resistance meter. Background technique [0002] At present, the known cigarette filter rod draw resistance calibration system is to manually put the standard rod that has been verified in advance into the measurement port before the instrument is used, and use the gas pressure sensor to measure the air pressure drop at both ends of the standard rod (one end is assumed to be a constant atmospheric pressure ) and convert it into a voltage drop, the ratio between the measured value and the calibrated standard value (hereinafter referred to as the coefficient) will participate in the subsequent calculation of other samples. As we all know, the flow of air and small changes in temperature will affect the measured value of the standard rod. As time goes by and the temperature changes, the manual calibra...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the drift problem caused by the existing manual calibration system, the technical problem to be solved by the present invention is to provide an automatic calibration system and calibration method for the suction r

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